enum BatchJobStatus (v201802)

Initial state of a BatchJob. While a job has this status, it is awaiting a file
upload to Google Cloud Storage.

ACTIVE

Indicates that a job has an associated file and is being executed.

CANCELING

Indicates that a job is being canceled. It will remain in this status until any
partial results are written, and then will be marked CANCELED. Send this status
in a SET operation to cancel a job that is in progress. This is the only status
that can be explicitly set.

CANCELED

Indicates that a job has been canceled. It will be garbage-collected 30 days
after cancellation.

DONE

Indicates that a job has completed. It will be garbage-collected 30 days after
completion.